土压平衡盾构施工诱发的地层及邻近建筑变形特征分析  

Characteristics Analysis of Ground and Adjacent Building Deformation Induced by Earth Pressure Balance Shield Construction

作　　者：万传真 WAN Chuanzhen(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou,Hebei 072750,China)

机构地区：[1]中铁十八局集团第三工程有限公司,河北涿州072750

出　　处：《施工技术(中英文)》2025年第7期12-18,共7页Construction Technology

基　　金：中国铁建股份有限公司2022年度科技研究开发计划(2022-C1);中铁十八局集团有限公司2022年度科研创新项目(C2022-051)。

摘　　要：土压平衡盾构是软土地层中地铁隧道施工最常用的施工工艺,相关研究已经取得了丰富成果,但目前依旧难以完全规避对地层的扰动,其主要原因为缺乏有效的监测数据。为了分析土压平衡盾构施工引起的地表、地层内部以及邻近建筑的变形规律,基于济南地铁4号线,针对地表沉降、地层内部的竖向及水平变形均进行了现场监测分析,同时监测记录了沿线建筑物的沉降变形。结果表明:济南地铁4号线施工过程中隧道上方地表最大沉降范围介于5~120mm,其中多数介于20~60mm。大多数地表沉降监测数据可用高斯函数拟合。隧道在黏土层中施工时沉降槽宽度参数i介于0.4Z~0.6Z,在砂层中施工时则小于0.4Z。在土仓压力较大的区段中,隧道中心以下深度处的土体向远离隧道方向变形。但对于隧道中心以上的土体,均呈现出朝向隧道的变形。Earth pressure balance is the most commonly used construction process for underground tunneling in soft ground,and related research has achieved rich results,but it is still difficult to completely avoid the disturbance of the ground,mainly due to the lack of effective monitoring data.In order to analyse the deformation patterns of the ground surface,the inner strata and the adjacent buildings caused by the earth pressure balance shield construction,on-site monitoring and analysis were carried out based on Line 4 of Jinan Metro for the settlement of the ground surface,the vertical and horizontal deformation of the inner strata,and at the same time,monitoring and recording the settlement and deformation of the buildings along the line.The results show that during the construction of Jinan Metro Line 4,the maximum ground settlement above the tunnel ranges from 5 to 120mm,with most of them ranging from 20 to 60mm,and most of the surface settlement monitoring data can be fitted with Gaussian functions.The settlement channel width parameter i ranged from 0.4Z to 0.6Z for the tunnel construction in the clay layer,and was less than 0.4Z for the tunnel construction in the sand layer.In the section with high soil compartment forces,the soil below the centre of the tunnel was deformed in the direction away from the tunnel.However,for the soils above the centre of the tunnel,all show deformation towards the tunnel.

关 键 词：地铁 隧道 盾构 土压平衡 沉降 变形 监测 

分 类 号：U231.4[交通运输工程—道路与铁道工程]